package designPattern.commond;
public class ConcreteCommand implements Command {
     private Receiver receiver = null;//���������
     private String state;
     public ConcreteCommand(Receiver receiver){
       this.receiver = receiver;
     }  
     public void execute() {
       //ͨ����ת�������߶������Ӧ�������ý�����������ִ�й���
       receiver.action();
     }
}